body {
	margin:0;
	padding:0;
	font-size:'Microsoft Yahei'f;
	background:#34495e;
}
.box {
	width:300px;
	padding:40px;
	position:absolute;
	top:50%;
	left:50%;
	transform:translate(-50%,-50%);
	background:#191919;
	text-align:center;
	border-radius: 10px;
}
.box h1 {
	color:white;
	text-transform:uppercase;
	font-weight:500;
}
.box input[type = "text"],.box input[type = "password"] {
	border:0;
	background:none;
	display:block;
	margin:20px auto;
	text-align:center;
	border:2px solid #3498db;
	padding:14px 10px;
	width:200px;
	outline:none;
	color:white;
	border-radius:24px;
	transition:0.25s;
}
.box input[type = "text"]:focus,.box input[type = "password"]:focus {
	width:280px;
	border-color:#2ecc71;
}
.box input[type = "submit"] {
	border:0;
	background:none;
	display:block;
	margin:20px auto;
	text-align:center;
	border:2px solid #2ecc71;
	padding:14px 40px;
	outline:none;
	color:white;
	border-radius:24px;
	transition:0.25s;
	cursor:pointer;
}
.box input[type = "submit"]:hover {
	background:#2ecc71;
}